Means for heating thick flanges of turbines.



(LA. PARSONS.

MEANS FOR HEATING THICK FLANGES 0F TUBIBINES. APPLICATION FILED M349,1909.

935,683. Patented 00s. 5, 1909.

Fig. 3

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UNITED STATES PATLNT -.orrtcje.

, CHARLES ALGEBN'ON PARSONS. OF NElNCASTLE-UBON-TYNE, ENG-LAND.

MEANS FOR HEATING THICK FIlANGES OF TURBINES.

Specification of Letters Patent.

Applicntionl'filed April 19, 1909. Serla1No.490,95 0.

the Thick Flanges ot' Turbines or other Motors, of which thefollowing'is a specifiea. tion.

This invention relates to the adjustment or control of the heating ofmotors operated by hotfluids such as steam or gas.

In some casesespecially in large engines and turbines, the exigencies ofdesign reare exposed to heat and pressure shall have a much greaterthickness or mass of metal at some parts-than at others which are in onewith them, as formstance, at the corners of the heavy flanges'ot'turbine casings. The

uneven heating which takes place in a given time consequent upon theseunequal masses produces serious difficulties and wheresuch masses arenecessary for the provision of flanges for joints, the distortionomit-regular expansion consequent upon the inequality of heating rendersit ditlicult to maintain the joints steam or gas tight.

Tle object of this lnvention is to prevent ,distortion due to heatingsuch irregular masses of metal.

The invention consists in forming'cavities in the flanges by means ofwhich the portions of the casing of amotor are socured together, thesecavities communicating by means of passages with the interior of themotor and with each other-and having an external communication to'a pipein which is placed a steam trap or the like, saidpipe either terminatingat said steam trap or extending beyond to a. regulating va lve and fromthenceto enter a lower pres- I sure part of the motorwhereby the hiltfluid in said motor is caused to circulate through said cavities.

Referring now tothe accompanying drawings, whichform part of thisspecification:-Fi,9 ures l and 2 are views showing two ways of allowingthe hot fluid to have access to the interior ofthe masses of metal inthe'fia nge of a turbine casing? Fig. 3 is adiagranunatic'representation of a turbine in elevation, a piece ofonejoint being shown insection to illustrate the connecion of 'a. steamlrap to the t'f'ltll-y in the flanges. Fig. 4c is a similar view to Fig.3, but showlng the hot fluid being comlucted hack to a lower pressurepart of a turlunc and a regulating valve being provided to control thecirculation of the hot fluid.

vIn a. modification shown in Fig. l, (5 represents the flanges ottwoportions or". a. turbine casing which are secured together :by holts,'b,so as to-produee a steani'or tight'joint. In these flanges, a,are'tormed cavities, c and (Z, comnmnicating with the interior of theturbine by means of the passages, c, and with each other by the passage,f. Att-he lowest point, of the cavity. (Z, is a hole, 5 extending to theexterior of the 'turhinecasing and communicating to a. pipe. Ii. Asshown in Fig. 3 this pipe, 71, COlliillll-. nieates with a. steam trap,i, or the like. 'ny this means any vater that may be formed by thecondensation of the steam in-the cavities, 0 and J, or the pipe, 1 1.,is go rid of and a circulation of the steam through the cavities isproduced by the occ: ulollill opening of the steanrtrap, 2'. If desiredhowever the pipe, 12., may continue beyond the steam trap,- z', andenter the tnrbineag'ain at a lower pressure part and a regulating valve,is, may be placed in the pipe, A, to control tlie circulation of steamthus pro duced. This modification is shown in In a further modificationshown in Fig. 2, the flanges, a, may have holes, haired thereincomnn'uncating with the int,

l'li'n (ll the turbine and also communicate with each other by means ofanother series of holes, a. 'A pipe, 71,- also communicates with the lowest point of the holes bored in the flanges. 0. this pipe may beconnected up according to either of the arrangements shown in Figs. 3and 4. v

In place of a hand controlled regulating valve, In, thernlostatieregulating means may be employed if desired.

By this means the; glilliculties of main taining a steam or gas tightjoint evenin very large casings are altogether avoided or materiallyreduced.

Having now described my invention What.-

I'claim asi'iew and desire to secure by Let ters Patent. is i 1. A motoroperated by hotfluitl ha; in combination :tcasing, sa c; mnstrueted in'a. plurality 0t on said portions by me: secured together, meanscirculation of the hottl' Patented Oct. 53, soon. 7

flanges whereby a tight joint may be main- Z111 combination a casing,said casing being tained between said .flanges.

2. A motor operated by hot fluid having in. combination a casing, saidcasing being constructed in a plurality of ortions, flanges on saidportions by means 0. which they are secured together, means acting toproduce a circulation of, the hot fluid through said flanges whereby atight joint may be maintained between said flanges, and meanscontrollingsaid circulation. 1

3. A motor operat d by hot fluid having in-combination a casing, saidcasing being constructed in a plurality of portions, flanges on saidportions'by means of which they are secured together, cavities in saidflanges, passages connecting said cavities with the interior of themotor and with each other, a passage extending from one of said cavitiesto the exterior of the fiange,-means in communication with said passageacting to produce circulation of the hot fluid through said passages andcavities. 4. A motor operated b hot fluid having in combination acasing, said casingbeing constructed in a plurality of portions, flangeson said. portions by means of which they are secured together, cavitiesin said flanges, passages connecting said cavities with the interior ofthe motor and with each other, a passage extending from the lowest pointof said pavities to the exterior of the flange, pipe means connectingsaid passage to a lower pressure portion of the motor whereby acirculation of the hot fluid through the cavities in said flanges isproduced.

' 5. 'A motor operated by hot fluid having in combination a casing, saidcasingbeing constructed irra plurality of ortions, flanges "on saidportions by means 0 which they are secured together, cavities on saidflanges, passages connecting said cavities with the interior of themotor and with each other, a passage extending from one of said cavitiesto the exterior-of the flange, means'in communication with said passageactingto produce circulation ofthe hot fluid through said passages andcavitiesfandlregulating means acting to control said c rculation.

6. A motor operated by hot fluid having constructed in a plurality ofportions, flanges on said portions by means of wlnch they are securedtogether, cavities in said flanges,.

passages connecting said cavities with'the interior ofthc motor and witheach other, a passage extending from the lowest point of said cavitiesto the exterior of the flange, pipe means connecting said passage to alower pressure portion of the motor whereby a circulation of the hotfluid through the cavities in said flanges is produced, and regulatingmeans in said pipe means serving to control said circulation.

7 A motor operated by hot fluid having in combination a casing, saidcasing being constructed in a plurality of portions, flanges in saidportions by means of which they are secured together, cavities in saidflanges, passages connectlng said cavities with the interior of themotor and with each other,

a passage communicating with the lowest point of 'said cavities andleading to the exterior of the flange, a-pipe in connection with saidpassage, and a steam trap connected to said pipe.

8. A motor operated by hot fluid, having in combination a casing, saidcasing being constructed in a plura ity of portions, flanges on saidportions by means of which they are secured together, cavities in saidflanges,

passages connecting said cavities with the interior of the motor andwith each other, a passage communicating with the lowest point of saidcavities and leading tothe e'xterior of the flange, a pipe in connectionwith said passage, and a steam trap connected to said pipe, said pipecommunicating with the interior of the motor at a lower pressure partand a regulating valve in said pipe between said steam trap and thepoint where the pipe reenters the turbine.

In testimony whereof, I affix my signature in presence of two witnesses.

- CHARLES ALGERNON PARSONS.

Witnesses:

FREDERICK GORDON HAY Bnnronn, WILLIAM SHEARER.

